[media] saa7115: Implement i2c_board_info.platform_data

This patch implements i2c_board_info.platform_data, and some options to
override the default initialization table for the GM7113C and SAA7113
chips.

Signed-off-by: Jon Arne Jørgensen <jonarne@jonarne.no>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

2 files changed, 134 insertions, 9 deletions

diff --git a/drivers/media/i2c/saa7115.c b/drivers/media/i2c/saa7115.c
index 17a464d4e526..5cc48f751b3a 100644
--- a/drivers/media/i2c/saa7115.c
+++ b/drivers/media/i2c/saa7115.c
@@ -225,19 +225,59 @@ static const unsigned char saa7111_init[] = {
 	0x00, 0x00
 };
 
-/* SAA7113/GM7113C init codes
- * It's important that R_14... R_17 == 0x00
- * for the gm7113c chip to deliver stable video
- */
+/* This table has one illegal value, and some values that are not
+   correct according to the datasheet initialization table.
+
+   If you need a table with legal/default values tell the driver in
+   i2c_board_info.platform_data, and you will get the gm7113c_init
+   table instead. */
+
+/* SAA7113 Init codes */
 static const unsigned char saa7113_init[] = {
 	R_01_INC_DELAY, 0x08,
 	R_02_INPUT_CNTL_1, 0xc2,
 	R_03_INPUT_CNTL_2, 0x30,
 	R_04_INPUT_CNTL_3, 0x00,
 	R_05_INPUT_CNTL_4, 0x00,
-	R_06_H_SYNC_START, 0x89,
+	R_06_H_SYNC_START, 0x89,	/* Illegal value -119,
+					 * min. value = -108 (0x94) */
+	R_07_H_SYNC_STOP, 0x0d,
+	R_08_SYNC_CNTL, 0x88,		/* Not datasheet default.
+					 * HTC = VTR mode, should be 0x98 */
+	R_09_LUMA_CNTL, 0x01,
+	R_0A_LUMA_BRIGHT_CNTL, 0x80,
+	R_0B_LUMA_CONTRAST_CNTL, 0x47,
+	R_0C_CHROMA_SAT_CNTL, 0x40,
+	R_0D_CHROMA_HUE_CNTL, 0x00,
+	R_0E_CHROMA_CNTL_1, 0x01,
+	R_0F_CHROMA_GAIN_CNTL, 0x2a,
+	R_10_CHROMA_CNTL_2, 0x08,	/* Not datsheet default.
+					 * VRLN enabled, should be 0x00 */
+	R_11_MODE_DELAY_CNTL, 0x0c,
+	R_12_RT_SIGNAL_CNTL, 0x07,	/* Not datasheet default,
+					 * should be 0x01 */
+	R_13_RT_X_PORT_OUT_CNTL, 0x00,
+	R_14_ANAL_ADC_COMPAT_CNTL, 0x00,
+	R_15_VGATE_START_FID_CHG, 0x00,
+	R_16_VGATE_STOP, 0x00,
+	R_17_MISC_VGATE_CONF_AND_MSB, 0x00,
+
+	0x00, 0x00
+};
+
+/* GM7113C is a clone of the SAA7113 chip
+   This init table is copied out of the saa7113 datasheet.
+   In R_08 we enable "Automatic Field Detection" [AUFD],
+   this is disabled when saa711x_set_v4lstd is called. */
+static const unsigned char gm7113c_init[] = {
+	R_01_INC_DELAY, 0x08,
+	R_02_INPUT_CNTL_1, 0xc0,
+	R_03_INPUT_CNTL_2, 0x33,
+	R_04_INPUT_CNTL_3, 0x00,
+	R_05_INPUT_CNTL_4, 0x00,
+	R_06_H_SYNC_START, 0xe9,
 	R_07_H_SYNC_STOP, 0x0d,
-	R_08_SYNC_CNTL, 0x88,
+	R_08_SYNC_CNTL, 0x98,
 	R_09_LUMA_CNTL, 0x01,
 	R_0A_LUMA_BRIGHT_CNTL, 0x80,
 	R_0B_LUMA_CONTRAST_CNTL, 0x47,
@@ -245,9 +285,9 @@ static const unsigned char saa7113_init[] = {
 	R_0D_CHROMA_HUE_CNTL, 0x00,
 	R_0E_CHROMA_CNTL_1, 0x01,
 	R_0F_CHROMA_GAIN_CNTL, 0x2a,
-	R_10_CHROMA_CNTL_2, 0x08,
+	R_10_CHROMA_CNTL_2, 0x00,
 	R_11_MODE_DELAY_CNTL, 0x0c,
-	R_12_RT_SIGNAL_CNTL, 0x07,
+	R_12_RT_SIGNAL_CNTL, 0x01,
 	R_13_RT_X_PORT_OUT_CNTL, 0x00,
 	R_14_ANAL_ADC_COMPAT_CNTL, 0x00,
 	R_15_VGATE_START_FID_CHG, 0x00,
@@ -1585,6 +1625,65 @@ static const struct v4l2_subdev_ops saa711x_ops = {
 
 /* ----------------------------------------------------------------------- */
 
+static void saa711x_write_platform_data(struct saa711x_state *state,
+					struct saa7115_platform_data *data)
+{
+	struct v4l2_subdev *sd = &state->sd;
+	u8 work;
+
+	if (state->ident != GM7113C &&
+	    state->ident != SAA7113)
+		return;
+
+	if (data->saa7113_r08_htc) {
+		work = saa711x_read(sd, R_08_SYNC_CNTL);
+		work &= ~SAA7113_R_08_HTC_MASK;
+		work |= ((*data->saa7113_r08_htc) << SAA7113_R_08_HTC_OFFSET);
+		saa711x_write(sd, R_08_SYNC_CNTL, work);
+	}
+
+	if (data->saa7113_r10_vrln) {
+		work = saa711x_read(sd, R_10_CHROMA_CNTL_2);
+		work &= ~SAA7113_R_10_VRLN_MASK;
+		if (*data->saa7113_r10_vrln)
+			work |= (1 << SAA7113_R_10_VRLN_OFFSET);
+		saa711x_write(sd, R_10_CHROMA_CNTL_2, work);
+	}
+
+	if (data->saa7113_r10_ofts) {
+		work = saa711x_read(sd, R_10_CHROMA_CNTL_2);
+		work &= ~SAA7113_R_10_OFTS_MASK;
+		work |= (*data->saa7113_r10_ofts << SAA7113_R_10_OFTS_OFFSET);
+		saa711x_write(sd, R_10_CHROMA_CNTL_2, work);
+	}
+
+	if (data->saa7113_r12_rts0) {
+		work = saa711x_read(sd, R_12_RT_SIGNAL_CNTL);
+		work &= ~SAA7113_R_12_RTS0_MASK;
+		work |= (*data->saa7113_r12_rts0 << SAA7113_R_12_RTS0_OFFSET);
+
+		/* According to the datasheet,
+		 * SAA7113_RTS_DOT_IN should only be used on RTS1 */
+		WARN_ON(*data->saa7113_r12_rts0 == SAA7113_RTS_DOT_IN);
+		saa711x_write(sd, R_12_RT_SIGNAL_CNTL, work);
+	}
+
+	if (data->saa7113_r12_rts1) {
+		work = saa711x_read(sd, R_12_RT_SIGNAL_CNTL);
+		work &= ~SAA7113_R_12_RTS1_MASK;
+		work |= (*data->saa7113_r12_rts1 << SAA7113_R_12_RTS1_OFFSET);
+		saa711x_write(sd, R_12_RT_SIGNAL_CNTL, work);
+	}
+
+	if (data->saa7113_r13_adlsb) {
+		work = saa711x_read(sd, R_13_RT_X_PORT_OUT_CNTL);
+		work &= ~SAA7113_R_13_ADLSB_MASK;
+		if (*data->saa7113_r13_adlsb)
+			work |= (1 << SAA7113_R_13_ADLSB_OFFSET);
+		saa711x_write(sd, R_13_RT_X_PORT_OUT_CNTL, work);
+	}
+}
+
 /**
  * saa711x_detect_chip - Detects the saa711x (or clone) variant
  * @client:		I2C client structure.
@@ -1693,6 +1792,7 @@ static int saa711x_probe(struct i2c_client *client,
 	struct saa711x_state *state;
 	struct v4l2_subdev *sd;
 	struct v4l2_ctrl_handler *hdl;
+	struct saa7115_platform_data *pdata;
 	int ident;
 	char name[CHIP_VER_SIZE + 1];
 
@@ -1756,14 +1856,20 @@ static int saa711x_probe(struct i2c_client *client,
 
 	/* init to 60hz/48khz */
 	state->crystal_freq = SAA7115_FREQ_24_576_MHZ;
+	pdata = client->dev.platform_data;
 	switch (state->ident) {
 	case SAA7111:
 	case SAA7111A:
 		saa711x_writeregs(sd, saa7111_init);
 		break;
 	case GM7113C:
+		saa711x_writeregs(sd, gm7113c_init);
+		break;
 	case SAA7113:
-		saa711x_writeregs(sd, saa7113_init);
+		if (pdata && pdata->saa7113_force_gm7113c_init)
+			saa711x_writeregs(sd, gm7113c_init);
+		else
+			saa711x_writeregs(sd, saa7113_init);
 		break;
 	default:
 		state->crystal_freq = SAA7115_FREQ_32_11_MHZ;
@@ -1771,6 +1877,10 @@ static int saa711x_probe(struct i2c_client *client,
 	}
 	if (state->ident > SAA7111A && state->ident != GM7113C)
 		saa711x_writeregs(sd, saa7115_init_misc);
+
+	if (pdata)
+		saa711x_write_platform_data(state, pdata);
+
 	saa711x_set_v4lstd(sd, V4L2_STD_NTSC);
 	v4l2_ctrl_handler_setup(hdl);
 
diff --git a/drivers/media/i2c/saa711x_regs.h b/drivers/media/i2c/saa711x_regs.h
index 70c56d19ea06..730ca90b30ac 100644
--- a/drivers/media/i2c/saa711x_regs.h
+++ b/drivers/media/i2c/saa711x_regs.h
@@ -202,9 +202,24 @@
 #define R_FF_S_PLL_MAX_PHASE_ERR_THRESH_NUM_LINES     0xff
 
 /* SAA7113 bit-masks */
+#define SAA7113_R_08_HTC_OFFSET 3
+#define SAA7113_R_08_HTC_MASK (0x3 << SAA7113_R_08_HTC_OFFSET)
 #define SAA7113_R_08_FSEL 0x40
 #define SAA7113_R_08_AUFD 0x80
 
+#define SAA7113_R_10_VRLN_OFFSET 3
+#define SAA7113_R_10_VRLN_MASK (0x1 << SAA7113_R_10_VRLN_OFFSET)
+#define SAA7113_R_10_OFTS_OFFSET 6
+#define SAA7113_R_10_OFTS_MASK (0x3 << SAA7113_R_10_OFTS_OFFSET)
+
+#define SAA7113_R_12_RTS0_OFFSET 0
+#define SAA7113_R_12_RTS0_MASK (0xf << SAA7113_R_12_RTS0_OFFSET)
+#define SAA7113_R_12_RTS1_OFFSET 4
+#define SAA7113_R_12_RTS1_MASK (0xf << SAA7113_R_12_RTS1_OFFSET)
+
+#define SAA7113_R_13_ADLSB_OFFSET 7
+#define SAA7113_R_13_ADLSB_MASK (0x1 << SAA7113_R_13_ADLSB_OFFSET)
+
 #if 0
 /* Those structs will be used in the future for debug purposes */
 struct saa711x_reg_descr {